Streaming的receiver模式

工具：Idea
Scala：版本2.10.6

<dependency>

            <groupId>org.apache.spark</groupId>

            <artifactId>spark-streaming_2.10</artifactId>

            <version>1.6.0</version>

    </dependency>

//以下不加否则本地启动会失败

pom中的provided指的是编译需要，发布不需要，当我们通过spark-submit提交时，spark会提供需要的streaming包，

而Intellij是通过java提交的，在运行时依然需要streaming的包，所以需要去掉．

<scope>provided</scope>

---

package SparkStreaming

import org.apache.spark.SparkConf

import org.apache.spark.streaming.{Seconds, StreamingContext}

import org.apache.spark.streaming.dstream.{DStream, ReceiverInputDStream}

/**

* receiver 模式（）旧

*/

object StreamingWC {

def main(args: Array[String]):Unit = {

val conf =new SparkConf().setAppName("wc").setMaster("local[2]")

val ssc =new StreamingContext(conf,Seconds(5))

val text: ReceiverInputDStream[String] = ssc.socketTextStream("192.168.23.101",6666)

val maps: DStream[String] = text.flatMap(_.split(" "))

val m = maps.map((_,1))

val reduce = m.reduceByKey(_+_)

//打印统计结果

    reduce.print()

//开始

    ssc.start()

//    等待停止线程

    ssc.awaitTermination()

}

}

---

[root@node1 ~]# jps

6469 Jps

5687 Kafka

4797 DFSZKFailoverController

4495 NameNode

[root@node1 ~]# nc -lk 6666

123

123 123

123 123

1 1

1 2

---

-------------------------------------------

Time: 1551356090000 ms

-------------------------------------------

(2,1)

(1,1)